Serial Attached SCSI SAS is the logical evolution of SCSI, retaining SCSIs longestablished software advantage. In addition, the Serial ATA SATA electrical and physical connection interface, which has much smaller connectors and cables, benefits SAS with greater system cooling and lower system cost. With enterprise storage requirements escalating and becoming more complex, factors such as larger capacity, greater density, security, scalability and accessibility are more critical than ever. Enterprise data centers must be online all the time, fulfill requests from numerous users simultaneously, allow for constant growth and expansion and be maintained during operation. SAS meets all of these demands while providing the highest performance. Aligning SAS and SATA technologies to serve storage users who need large capacities at a lower cost provides greater choice to the industry.

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Website: http://www.scsita.org/aboutscsi/sas/definition.html